Fig. 1. Fruit of highbush blueberry infected by Glomerella acutata five weeks after start of incubation in saturated air at room temperature. The orange conidial spore mass is the imperfect stage of the fungus (Colletotrichum acutatum) and the black spots in and between the conidial spore masses are perithecia (the perfect stage). Photo by E. Fløistad.